2.1471   ODE No. 1471

1. Problem in Latex
2. Mathematica input
3. Maple input

$$f(x)y^{″}(x)+f(x)y(x)+y^{\prime }(x)+y^{(3)}(x)=0$$ ✓ Mathematica : cpu = 0.0788075 (sec), leaf count = 84

$$\left\{\{y(x)\to c_3{e}^{ix}{\int }_1^x{e}^{-2iK[3]}{\int }_1^{K[3]}\exp ({\int }_1^{K[2]}(i-f(K[1]))dK[1])dK[2]dK[3]+c_1{e}^{ix}+\frac{1}{2}i{c}_2{e}^{-ix}\}\right\}$$ ✓ Maple : cpu = 0.329 (sec), leaf count = 36

$$\{y\left(x\right)={\mathrm{e}}^{ix}(\int {\mathrm{e}}^{-2ix}(\int \mathit{\_}\mathit{C}\mathit{3}{\mathrm{e}}^{\int i-f\left(x\right)\mathrm{d}x}\mathrm{d}x+\mathit{\_}\mathit{C}\mathit{2})\mathrm{d}x+\mathit{\_}\mathit{C}\mathit{1})\}$$